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According to developers, the technology is capable of scaling to massive sizes, with a proposed $53M turbine able enough to replace 1000 traditional windmills and power 750 thousand homes. Additional benefits include the ability to generate power with winds as slow as three miles per hour, operational costs some 50 percent cheaper than windmills, and an estimated lifespan of 500 years.
the real proof will come when these things get put to use, which may happen sooner than you'd think: Development is proceeding rapidly in both the US and China,
Magnetic levitation is an extremely efficient system for wind energy. Here’s how it works: the vertically oriented blades of the wind turbine are suspended in the air above the base of the machine, replacing the need for ball bearings. The turbine uses “full-permanent” magnets, not electromagnets — therefore, it does not require electricty to run. The full-permanent magnet system employs neodymium (”rare earth”) magnets and there is no energy loss through friction. This also helps reduce maintenance costs and increases the lifespan of the generator.
it"solves 11 different problems that previously limited the development of vertical-axis wind turbines for generation of electricity ." The center hub floats on a magnet, and the coils that generate the power are at the outer ring, with magnets at the tips of the blades flying over them at high speed. It is designed for home installation in urban settings; It is only 4 feet high, so neighbours are unlikely to complain about its appearance.
Specifications are impressive:
* Productivity: 1100 kWh/month in a 13 mph average wind
* Name Plate: 5 kW rated output in 28 mph wind at sea level with 80% relative humidity.
* Cut-In Speed: Less than 5 mph.
* Top Speed: Greater than 100 Mph.
* Economics: Fully burdened cost over 10 years is 3.5 cents per kW.
* ROI: If current bill is $300 per month or more, then ROI 3 years or less.
* Maintenance & Operation Costs: Minimal
* Deployment: Rooftop Urban or Rural Setting.
* Total Estimated Production Run 2006: 3,500 Units
* Production Units Ready Spring 2006
Originally posted by apex
If that is really as good as that sounds, then that is one great idea, and I am surprised no one had thought of such an idea before.
Although 1000 times more efficient does sound far too good to be true.
Originally posted by Keyhole
The reason why these windmills can produce so much electricity is because of the size of these things.
It takes an awful lot of wind pressure to turn the generators that can produce this much electricity. These windmills are
Here's a picture of one, note the size of the streetlamps near the windmill.
CHANGSHA, Nov. 5 (Xinhua) -- Construction began on the world's largest production base for magnetic levitation (maglev) wind power generators in central China on Monday.
The Guangzhou-based Zhongke Hengyuan Energy Technology Co. Ltd. invested 400 million yuan in building the base for the generators, from which it expects a yearly revenue of 1.6 billion yuan.
The base will produce a series of maglev wind power generators with capacities ranging from 400 to 5,000 watts in the first half of 2008, said a company statement.
Originally posted by Keyhole
I did read the articles!
What I was talking about was the energy needed to turn the generators.
They need these windmills this big to take advantage of the lower wind speeds/pressure over a greater area (the fins) to be able to turn spin the generators that produce the electricity!
These windmills have to be this big to turn the generators, otherwise I'm sure they would have made them smaller!